OpenMusic 6 – User ManualHierarchie de section : OM Objects > OM Basic Objects > Functions Package > BPF and BPC Tools > ManipulationsManipulating Objects
Defining Functions
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Sample-fun applies a mathematic function over a given numeric interval, samples the resulting curve at a given frequency and returns the corresponding values. A BPF or BPC can be materilalized out of the sampled values. |
Sample-fun has two default inputs and outputs :
- "function" : a function Lisp name, such as "sin" for "sinus", "exp" for "exponantial"... The default value of "function" is "sqrt",for "square table".
- "step" : a sampling frequency number.
- the first output returns the sampled values
- the second output can be connected to a BPF or BPC.
It has three optional inputs :
- "xmin" and "xmax" : a sampling range.
- "coeff" : a multiplication coefficient for the sampled values.
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Linear-fun defines linear y = f(x) functions. It can be used as a lambda-function. |
Linear-fun has four inputs and one output :
- "x0" and "y0" : coordinates of the first point.
- "x1" and "y1" : coordinates of the second point.
Its output can be connected to :
- a BPF or BPC
- to sample-fun, applied as a lambda function.
Manipulating Existing Funcitons
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The bpf-get-val function interpolates BPFs or BPCs with one or several values. |
The bpf-get-val function has two inputs :
- "bpf / bpc" : self value of the object
- "val" : a single value or a list, including the coordinates of another BPF or BPC.
- Its output can be connected to a BPF or BPC.
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Get-spline-obj materializes a BPF or BPC out of a spline. |
The get-spline-obj has three inputs, which resembles the parameters of a BPF spline, and one output :
- "self" : a BPF or BPC
- "resolution" : a number
- "degree" : a number between 1 and 8, although the spline degree remains limited.
- Its output returns the value of a new BPF or BPC.
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Get-spline-points extracts the coordinates of all the points of a spline. |
The get-spline-points function has three inputs and one output :
- "self" : a BPF or BPC.
- "resolution" : a number.
- "degree" : a number.
- Its output returns a list of coordinates.
